20" Wheel/Tire Size
05-05-13, 02:53 PM
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DancesWithSUVs
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20" Wheel/Tire Size
Wasn't sure whether to ask here or over in the BMX forum. I just picked up a Schwinn Qualifier off eBay. It was supposed to be for a new kind of parking lot BMX street racing that never caught on. The wheels are 20",and the skinwall tires are shot,so I need to replace them. The tires have no markings other than 20x1.62". The rims are marked Femco 20x1.50. The inner tube is marked 20x1.75 (47-408) (I'm positive it's an 8 and not a 6) and the rim tape is marked 20x1.75 570x16. Is this a 406 wheel or some weird size? I tried measuring the diameter and comparing to my 406 folders,but the nutted axles mean I can't get a good measurement with a tape,although it seems to be the same size. When I tried mounting a modern 1.5" 406 tire;it went on really easy,and I was able to inflate it no prob,but I could not get the bead to properly seat after 3 tries. The rims are true,no damage. Checked Sheldon's site with no luck. Anybody familiar with these? Thanks in advance.
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C'dale BBU('05 and '09)/Super Six/Hooligan8and 3,Kona Dew Deluxe,Novara Buzz/Safari,Surly Big Dummy,Marin Pt Reyes,Giant Defy 1,Schwinn DBX SuperSport,Dahon Speed Pro TT,Brompton S6L/S2E-X
C'dale BBU('05 and '09)/Super Six/Hooligan8and 3,Kona Dew Deluxe,Novara Buzz/Safari,Surly Big Dummy,Marin Pt Reyes,Giant Defy 1,Schwinn DBX SuperSport,Dahon Speed Pro TT,Brompton S6L/S2E-X
05-05-13, 04:12 PM
#2
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measure the rim yourself? rim OD is 422 on a 406 (bead seat diameter) rim. r = 1/2 D
[Ref: Sutherlands]
[Ref: Sutherlands]
05-05-13, 09:56 PM
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Insane Bicycle Mechanic
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Wasn't sure whether to ask here or over in the BMX forum. I just picked up a Schwinn Qualifier off eBay. It was supposed to be for a new kind of parking lot BMX street racing that never caught on. The wheels are 20",and the skinwall tires are shot,so I need to replace them. The tires have no markings other than 20x1.62". The rims are marked Femco 20x1.50. The inner tube is marked 20x1.75 (47-408) (I'm positive it's an 8 and not a 6) and the rim tape is marked 20x1.75 570x16. Is this a 406 wheel or some weird size? I tried measuring the diameter and comparing to my 406 folders,but the nutted axles mean I can't get a good measurement with a tape,although it seems to be the same size. When I tried mounting a modern 1.5" 406 tire;it went on really easy,and I was able to inflate it no prob,but I could not get the bead to properly seat after 3 tries. The rims are true,no damage. Checked Sheldon's site with no luck. Anybody familiar with these? Thanks in advance.
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05-06-13, 02:49 PM
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DancesWithSUVs
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Yeah,the tires are pretty weird. Labeled "keep inflated 35-40psi",which is not only really low,but pretty specific. I'm going to try some 2" Big Apples,maybe the 1.5's were just too narrow.
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C'dale BBU('05 and '09)/Super Six/Hooligan8and 3,Kona Dew Deluxe,Novara Buzz/Safari,Surly Big Dummy,Marin Pt Reyes,Giant Defy 1,Schwinn DBX SuperSport,Dahon Speed Pro TT,Brompton S6L/S2E-X
C'dale BBU('05 and '09)/Super Six/Hooligan8and 3,Kona Dew Deluxe,Novara Buzz/Safari,Surly Big Dummy,Marin Pt Reyes,Giant Defy 1,Schwinn DBX SuperSport,Dahon Speed Pro TT,Brompton S6L/S2E-X
